function getUserInfo(pageName){
  $.ajax({
      url:"login",
      type:"get",
      success:function(user){
          if(user.id && user.id>0){
              //展示用户信息
              showUserInfo(pageName);
          }else{
              //跳转到登录界面
              location.assign("login.html");
          }
      }
  });
}
function showUserInfo(pageName){
  var url;
  if(pageName=="detail"){
      url = "user"+location.search;
  }else{
      url = "user";
  }
  $.ajax({
      type:"get",
      url:url,
      success:function(user){
          console.log(user);
          document.querySelector(".left .card h3").innerHTML = user.userName;
          document.querySelector(".left .card a").href = user.githubUrl;
          //如果登录用户和作者是同一个人, 添加删除链接
          if(user.isYourBlog && user.isYourBlog==1){
              var nav = document.querySelector(".nav");
              var a = document.createElement("a");
              a.className = "nav-span";
              a.innerHTML = "删除博客";
              a.href = "delete"+location.search;
              nav.insertBefore(a,nav.children[5]);
          }
      }
  });
}